Remember the Silly Car Contest? I saw a strong contender the other day: a Honda Element with an aftermarket "Woody" kit. It looked very much like this:
Image courtesy of www.vwwoody.com
Notice how the "wood" panels on the doors don't even follow the line of the door panels. Ugh.
You can buy all kinds of woody kits at vwwoody.com, even for a Mini.
Your only limits are the limits of your poor taste.